What two processes combined are referred to as external respiration?
A. Pulmonary ventilation and systemic gas exchange
B. Gas transport and pulmonary ventilation
C. Systemic gas exchange and gas transport
D. Systemic gas exchange and aerobic respiration
E. Breathing and alveolar gas exchange
Answer: E
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Protein digestion takes place in the __________ and the __________
Fill in the blank with correct words.
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